package com.sky.service.impl;

import ch.qos.logback.core.LogbackException;
import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONObject;
import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.sky.constant.MessageConstant;
import com.sky.dto.UserLoginDTO;
import com.sky.entity.User;
import com.sky.exception.LoginFailedException;
import com.sky.mapper.UserMapper;

import com.sky.properties.WeChatProperties;
import com.sky.service.IUserService;
import com.sky.utils.HttpClientUtil;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.util.Date;
import java.util.HashMap;

/**
 * <p>
 * 用户信息 服务实现类
 * </p>
 *
 * @author author
 * @since 2025-05-18
 */
@Service
@Slf4j
public class UserServiceImpl extends ServiceImpl<UserMapper, User> implements IUserService {
    //微信服务接口地址
    public static final String WX_LOGIN_URL = "https://api.weixin.qq.com/sns/jscode2session";
    @Autowired
    private WeChatProperties weChatProperties;

    @Autowired
    private UserMapper userMapper;

    @Override
    public User wxLogin(UserLoginDTO userLoginDTO) {

        //1.调用微信接口服务，获取当前用户的openid
        String openid = getOpenid(userLoginDTO.getCode());

        //2.判断openid是否为空，如果为空表示登录失败
        if (openid == null) {
            throw new LoginFailedException(MessageConstant.LOGIN_FAILED);
        }
        //3. 判断当前用户是否为新用户
        LambdaQueryWrapper<User> wrapper = new LambdaQueryWrapper<>();
        wrapper.eq(User::getOpenid, openid);
        User user = userMapper.selectOne(wrapper);
        //4.如果是新用户，完成自动注册
        if (user == null) {
            user = User.builder().openid(openid)
                    .createTime(new Date())
                    .build();
            userMapper.insert(user);
        }
        //5.返回这个用户对象
        return user;


    }

    private String getOpenid(String code) {
        //1.调用微信接口服务，获取当前用户的openid
        HashMap<String, String> map = new HashMap<>();
        map.put("appid", weChatProperties.getAppid());
        map.put("secret", weChatProperties.getSecret());
        map.put("js_code", code);
        map.put("grant_type", "authorization_code");
        //2.发起http请求，获取到json字符串
        String json = HttpClientUtil.doGet(WX_LOGIN_URL, map);
        // 解析返回的JSON中的openid数据
        JSONObject jsonObject = JSON.parseObject(json);

        String openid = jsonObject.getString("openid");
        return openid;
    }
}
